newbie question about python and Tkinter

[newbie]

Hello,

I am a newbie and have a few questions about Python and Tkinter.

I would like to create the following layout in Python:

*******************************************
*                                         *
*                                         *
*                                         *
*         frame 1                         *
*                                         *
*                                         *
*                                         *
*                                         *
*******************************************
*                       *                 *
*                       *                 *
*                       *                 *
*    frame 3            *  frame 2        *
*                       *                 *
*                       *                 *
*                       *                 *
*******************************************

I try to accomplish this with the following code:

from Tkinter import *

root = Tk()
root.title("Critter World")

MyFrame0 = Frame(root, background="brown")  # One Parent Frame to rule
them all

MyFrame1  = Frame(MyFrame0, background = "yellow")
MyFrame2  = Frame(MyFrame0, background = "red")
MyFrame3  = Frame(MyFrame0, background = "green")

b1 = Label(MyFrame1, text="World", background="yellow").pack(fill=BOTH,
expand=YES)
b2 = Label(MyFrame2, text="Info", background="red").pack(fill=BOTH,
expand=YES)
b3 = Label(MyFrame3, text="Control",
background="green").pack(fill=BOTH, expand=YES)

MyFrame1.pack(side=TOP, fill=BOTH, expand=YES)
MyFrame2.pack(side=RIGHT, fill=BOTH, expand=YES)
MyFrame3.pack(side=LEFT, fill=BOTH, expand=YES)

MyFrame0.pack(fill=BOTH, expand=YES)
raw_input()
print "\n"*23

When the window resizes, it is only Frame1 that is resized.




However, if I run the following:



from Tkinter import *

root = Tk()
root.title("Critter World")

MyFrame0 = Frame(root, background="brown")  # One Parent Frame to rule
them all

MyFrame1  = Frame(MyFrame0, background="yellow")
MyFrame2  = Frame(MyFrame0, background = "red")
MyFrame3  = Frame(MyFrame0, background = "green")
MyFrame4  = Frame(MyFrame0, background = "black")


b1 = Label(MyFrame1, text="World", background="yellow").pack(fill=BOTH,
expand=YES)
b2 = Label(MyFrame2, text="Info", background="red").pack(fill=BOTH,
expand=YES)
b3 = Label(MyFrame3, text="Control",
background="green").pack(fill=BOTH, expand=YES)
b4 = Label(MyFrame3, text="NEXT 1", background="green").pack(fill=BOTH,
expand=YES)


MyFrame1.pack(side=TOP, fill=BOTH, expand=YES)
MyFrame2.pack(side=RIGHT, fill=BOTH, expand=YES)
MyFrame3.pack(side=LEFT, fill=BOTH, expand=YES)
MyFrame4.pack(side=BOTTOM, fill=BOTH, expand=YES)

MyFrame0.pack(fill=BOTH, expand=YES)
raw_input()
print "\n"*23

I get:

*******************************************
*                                         *
*                                         *
*                                         *
*         frame 1                         *
*                                         *
*                                         *
*                                         *
*                                         *
*                                         *
*                                         *
*                                         *
*                                         *
*                                         *
*******************************************
*                       *                 *
*                       *                 *
*    frame 3            *                 *
*                       *                 *
*                       *                 *
*************************  frame 2        *
*                       *                 *
*                       *                 *
*    frame 4            *                 *
*                       *                 *
*                       *                 *
*******************************************

and when I resize, all frames are resized?

Any idea why?


A related question:

Why does frame 4 not span the bottom ?

i.e.

*******************************************
*                                         *
*                                         *
*                                         *
*         frame 1                         *
*                                         *
*                                         *
*                                         *
*                                         *
*                                         *
*                                         *
*                                         *
*                                         *
*                                         *
*******************************************
*                       *                 *
*                       *                 *
*    frame 2            *    frame 3      *
*                       *                 *
*                       *                 *
*******************************************
*                                         *
*                                         *
*              frame 4                    *
*                                         *
*                                         *
*******************************************


NOTE:

I am running PYTHON and Tkinter on a windows' XP box.